Stop-valve.



No. 794,014. PATENTED JULY 1905. J HUPKINWN 3; R. KILBURNQ STOP VALVE]APPLIUATION FILED 1220.27. 1904.

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MI I a% No. 794,014. IPATENTBD JULY 4. 1905. J. HOPKINSON & R. KILBURN.

STOP VALVE APPLICATION FILED DBO. 27, 1904.

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fiatentec'l July 4t, i905.

rli'riniar :irric QltlifiElll llUPlQllilSUN AND RICHARD KllJllUltN, ()l

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SPECIFICATION formingpart of Letters Patent l lo. 794,014t, dated, July4:, 1905.

Application filed December 2'7, 1904. Serial No. 288,456.

Be it known that we, ,losnru l'llIHKlNSON and ltlcuano li iiin'nnn,subjects ol the King of (treat .liritain, residing at lrludderslield,lflnglalul, have invented certain no and uselnl lmprovcmcnts inthaw-Valves, ol which the Following is a s ecilication,

ln the specification of application tierial No. 2.l8,'l-ll we describean invention applicable to screw-down stop-valves of the mushroom typelor steam and other ll uids wherein two valves are used working inopposite directions and arranged on opposite sides of a seating lloor orpartition. Said valves are cmjinected together through their actuatingmechanism and are arranged to close onto the seating-floor from oppositesides thereof and to nip said floor when closed without straining thevalve-casing or bringing onesided pressure to hear on the seating-floorby the closing means. ln carrying out that invention we employed for oneol the valves a tubular spindle connected to a bridge having a limitedmovementon lixed guides, the spindle ol' the other valve being arrangedto pass through the aforesaid tubular spindle and beillg connected tothe bridge by a screwtln-eallcd sleeve. ln this construction,therel'ore, the connections are concentric.

Now according to the present invcntioi'l we GI'l'lplO V the samearrange:ncnt of valves for nippiiig the seating-lloor, but we dispensewith the concentric arrznigmnent ol spindles, and in lieu thereol wepass the val vcspindlcs out in opposite directions through lids onopposite sides ol the casing, so that no spindle passes through thethoroughfare in the partition, as heretofore, and we actuate thespindles by connected gearing or by cm'inected levers or rods and screwmechanism.

Iln the accompanying ,drawings we have illustrated our improved valve incentral Fig. 2 levers, and Fig. 3

ing a seat-Face on both sides thereol', and t, ll the two valves Forclosing the thorough- Iare through the partition. 'lhescvalvcs areinserted from opposite sides ol the valvecasing through openings whichare closed by lids l l so that the spindle ol the lower 'alvedoes notpass through and partially obstruct the thoroughl'are, as it does in thearrangement described in the specification above relcrred to. Thespindle c of the valve C passes through a slalllil'lg-box If in the lidll], and the spindle (1 ol' the valve l) passes through a stnli'ing-boxfin the lid F. Both these stufling-boxes are accessible from the exteriorand can be readily packed and adjusted when required.

la the arrangement shown in Fig. l the spindle 0 screws through across-bar (,1, carried by the lid l9, and the spindle screws through across-bar it, carried by the lid .l These cross-bars also form bearingslor the actuating-spindle ti, which is geared to the spindle c bygear-wlm-cls 'l I: and to the spindle (Z by gcar-wheels U 1/. The wheels'l t a are lixed to their respective spindles; but the wl'lecl U has itsbore screw-thrcadml and en gages with a screw-threaded part ol* thespindle s. V W are collars lived on the spindle l5 on opposite sides olthe wheel U, and Y is a. spring arranged between the collar V and thewheel U for a purpose hereinafter explained.

To open the valve, the llztl'nlkWlHfGl K is rotated connter-clockwise,when the upper or main valve C will be lil'tcd from its seat by theaction of the upper pair of gear-wheels; but the lower valve will bekept to its seat by the steaul-pressure under it, and the wheel U willtravel down the spindle s until it comes against and is locked by thelixed collar \V, whereupon lurthcr rotation ol the hand-wheel in thesame direction will open the valve l). 'lo close the valve, thehalal-wheel K, is rotated clockwise, when both valves U and I) willbegin to close si1nultancously; but the valve l) will reach its seatwhile the valve U is still open equal to the hill area. Further rotationof the halal-wheel in the same direction willcause a spring-plunger Z torelease the wheel U, and the latter will then travel up the spindle Swhile the valve G is completing its closing movement. hen the valve 0reaches its seat, the wheel U at the same time engages with the springY, and any further movement of the hand-wheel will press the valvestightly on their seats.

In the arrangement shown in Fig. 2 the spindles 0 (Z are suitablyconnected, respectively, to the inner ends of levers G H, which arefulcrumed, respectively, at f/ b and the outer ends of said levers areconnected together by a screw-threaded link or rod J, tur nished with ahand-wheel IQ for rotating it. As shown, the lever H carries a pivotednut L, through which the screw-threads ol* the rod J are screwed, andthe lever (i construeted to be engaged by collars jj on the rod J, sothat the said rod can rotate without moving the lever Ur, but cannotmove longitudinally without carryiijig the lever (i with it. On turningthe rod J in the proper dircctiou the 'alve C on the outlet side of thepartition will he opened first, the other valve remaining closed; hutwhen the valve U is fully opened and comes against the lid, which termsa stop therefor, then the continued rotation of the rod J in the samedirection will cause the valve 1 to open in the opposite direction tothe valve (1. Similarly the rotation of the rod J in the other directionwill first close the valve 1) and then the valve C. Instead of utilizingthe lid as a stop for the valve C an external step can he provided.

In the arrangement shown in Fig. 3 the spindle of the valve C isscrew-threaded and screws through a cross-bar M, which is con nected. bylinks N N to a second cross-bar O, lixed on the spindle of the valve D.P 1 are guide-rods to prevent rotation of the crossbar M. On turning thespindle e the valve 0 is raised until it comes against the lid, and thencontinued rotation of the spindle 0 in the same direction causes thecross har M to move downward, and so open the valve l).

The reverse action takes place when closing the valve.

In all the above-described arrangements of valve both valves control thethoroughfare through the seating-floor, and if either valve is tightnotwithstanding that the other may leak no steam or fluid can passthrough the thoroughfare.

hat we claim is i. In a stop-valve, the combination, with a val ve-casing, of a partition having a thorought'are therethrough, a seat-'t'ace oneach side of said partition, a pair of valves for engaging with the saidseat-faces, the spindles of said valves passing out of the valve-casingon opposite sides thereof, and means for connecting and actuating saidalve-spindles.

2. in a stop-\ 'alvc, the combination, with a valve-casing, oiapartition havi ng a thoroughfare theretln-ough, a seat-face on each sideof said partition, a pair ol" valves for engaging with the saidseat-faces, the spindles of said valves passing out oi the valve-casingon opposite sides thereof, a crossha r l\l screwthreaded on one of theval ve-spi ndles, a crossbar 0 iixed to the other valve-spimlle, andlinks N, N uniting said cross-bars M, O.

3. in a stop-valve, the comljiination, with a val ve-casing, of apartition having a thoroughfare therethrough, a seat-face on each sideof said partition, a pair of valves for enga ing with the saidseat-faces, the spindles ol said valves passing out of the val ve-casingon opposite sides thereof, a cross-har M screwthreaded on one of the valve-spindles, a crossbar 0 fixed to the other valve-spindle, links N, Nuniting said cross-bars M, O, and guides P, P for the cross-bar M.

in testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

JOSEPH HOPKINSON. RICHARD KILBUHN. Witnesses:

JOHN R. SUALAM, 'lnonms ll. H i'ns'r.

